She's probably insecure and needs validation that you aren't going to bail on her like the other guys did. Sex can be so much more emotional for girls than guys, might be hard for you to understand that. I agree with Vash though, let her know you miss her/care for her but will talk to her tomorrow/later today/after class, etc
So, so you think you can tell Heaven from Hell,
blue skies from pain.
Can you tell a green field from a cold steel rail?
A smile from a veil?
Do you think you can tell?
And did they get you to trade your heroes for ghosts?
Hot ashes for trees?
Hot air for a cool breeze?
Cold comfort for change?
And did you exchange a walk on part in the war for a lead role in a cage?